Effect of the discrepancy of the dose calculation results of different algorithms on CyberKnife lung tumor treatment plan
10.3760/cma.j.issn.1004-4221.2018.12.011
- VernacularTitle:射波刀肺部治疗计划不同剂量算法差异的影响因素分析
- Author:
Jing YANG
1
;
Hongyuan LIU
;
Ting CAO
;
Xin NIE
;
Gang LIU
;
Zhiwen LIANG
;
Jun HAN
;
Qin LI
Author Information
1. 华中科技大学同济医学院附属协和医院肿瘤中心
- Keywords:
CyberKnife;
Monte Carlo algorithm;
Ray Tracing algorithm;
Prescription coverage
- From:
Chinese Journal of Radiation Oncology
2018;27(12):1083-1087
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the effect of the discrepancy of the dose calculation results of different algorithms upon the CyberKnife lung tumor treatment plan,and assess the impact of tumor volume and location on the dose calculation results. Methods Thirty-two cases of lung tumors were treated with MultiPlan 5.2.1 planning system of CyberKnife VSI.Ray Tracing and Monte Carlo algorithms were adopted to calculate the dose distribution, and then the calculation results were statistically compared between two algorithms. Results For the enrolled cases,the calculation results of these two algorithms demonstrated that the deviation range of prescription dose coverage of planning target volume (PTV),conformal index,new conformal index and uniformity index were 0.93%~68. 80%, 0.87%~17. 21%,-212.38%~8. 27% and 0%~15. 17%, respectively. Conclusions In the CyberKnife treatment of lung tumors, the volume and location of tumors exert significant impact on the discrepancies of the dose calculation results of different algorithms. The smaller tumor volume and longer beam heterogeneity path are likely to generate a greater discrepancy. It is recommended to adopt or refer to the calculation results of Monte Carlo algorithm to deliver corresponding treatment.
